a {
    width: -webkit-fill-available;
    width: -moz-available;
    width: fill;
}

b {
    height: -webkit-max-content;
    height: -moz-max-content;
    height: max-content;
}

p {
    block-size: -webkit-min-content;
    block-size: -moz-min-content;
    block-size: min-content;
    min-inline-size: -webkit-fit-content;
    min-inline-size: -moz-fit-content;
    min-inline-size: fit-content;
}

.old {
    width: -webkit-fill-available;
    width: -moz-available;
    width: fill-available;
}
